I gave up spending money on expensive barrels years ago. I?ve had sub $100 barrels that would outshoot barrels costing three to four times as much. As long as the cheaper barrel is headspaced correctly and the gas port is sized properly it should work.

Definitely don?t cheap out on the BCG. The difference between a cheap one and a something like a BCM unit is maybe $50-$80.

Post pictures if your project becomes reality.